Metallic nanofoam wrings hydrogen out of water more efficiently
Hydrogen could be a key renewable fuel source in the future, but considering it's the most abundant element in the universe it's surprisingly tricky to produce. Zapping hydrogen out of water through a process called electrolysis is the cleanest way, but the catalysts required are rare-Earth metals like platinum. Researchers at Washington State University have now developed a quick and inexpensive alternative, making a "nanofoam" catalyst out of nickel and iron that they say performed better than usual.
Water electrolysis hasn't quite made it to industrial scale yet, mostly due to the costs of those catalysts and the high energy input required to trigger the reaction. Improving these areas is a key area of research, with scientists tackling the problem by using catalysts such as inexpensive molybdenum sulfide, and hybrid solid-state electrolyzers.
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